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If recent rumors are anything to go by, the Reds in particular might be paying close attention to him.
The striker has been in superb form for Newcastle this season - in fact, only Mohamed Salah has scored more Premier League goals than him this season.
18 of his 19 goals in the league have come in his last 18 games, while he also played a huge part in getting the Magpies to the Carabao Cup final, where they will meet the Reds again next month.
It was against Liverpool in early December that Isak truly kick-started his hot streak, the first of eight Premier League games in a row in which he found the net.
For its part, Liverpool sits atop the Premier League and Champions League tables, with firepower not having been a major issue.
Alexander Isak has already made his feelings on Liverpool clear amid transfer speculation.
Of course, it still feels like the longest of shots for the Swede to arrive on Merseyside this summer, although former Reds striker Emile Heskey has suggested that the 25-year-old might have a plan in place which could open the door.
"If Newcastle do qualify for the Champions League, I can't see them selling any of their best players," Heskey told Instant Casino (via ChronicleLive) For every player, the Champions League is where it's at
It's the pinnacle in club football.
"So, I think to keep a player like that, there might be a gentleman's agreement between him and the club where they will allow him to leave if Champions League football isn’t on the St James' Park menu."
An original version of this article was first published on January 22
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